大家不忙时看看这几句话哪里有语法错误,并指正,(前提是尽量少的改动句子结构)

题目

大家不忙时看看这几句话哪里有语法错误,并指正,(前提是尽量少的改动句子结构)
Carbon monoxide from factories and cars polluted extremely aotomesphere.
We heard from the industrial engineer.He was doubt if our play was fessibility.
I'm very clear that her conclusion is based on fact.
A medical team who were composed of three doctors and two nurses gone to that village sereval days ago.
That battle in 1861 during north and south broke out,which was known as "America Civil War" in history.

答案

Carbon monoxide from factories and cars polluted aotomesphere extremely.
We heard from the industrial engineer that he was doubting if our plan was fesible.
I'm very clear that her conclusion was based on fact.
A medical team who was composed of three doctors and two nurses went to that village sereval days ago.
That battle in 1861 between north and south broke out,which was known as "America Civil War" in history.